Previn gained international attention in 1992 when it was revealed that she
was having a relationship with her own adoptive mother's long-time romantic
partner, Woody Allen.[2]
The relationship began in late 1991 and became known to Farrow in January
1992.[4]

The affair was covered by tabloids,
focusing not only on her familial relation to Allen's long-time partner, her own
adoptive mother, and to their children, but also the 34-year age difference
between Previn and Allen.

Allen and Farrow's biological son, Ronan Farrow, said of
Allen: "He's my father married to my sister. That makes me his son and his
brother-in-law. That is such a moral transgression."[5][6]
Soon-Yi Previn said in 1992 that she does not, and never did, consider Woody
Allen to be her father, stepfather, or father figure; she said she considers André
Previn to be her adoptive father.[7]
She also commented that "I was never remotely close to Woody. He was someone who
was devoted exclusively to his own children and to his work, and we never spent
a moment together."[7][8]